People are often advised not to carry fountain pens while travelling by air.

The tip of the nib of a fountain pen is cut , so that

Why is it advisable not to talk while eating?

How do you prepare your own herbarium sheets? What are the different tools you carry with you while collecting plants for the preparation of a herbarium? What information should a preserved plant material on the herbarium sheet provide for taxonomical studies?

The rope shown at an instant is carrying a wave travelling towards right, created by a source vibrating at a frequency n . Consider the following statements I. The speed of the wave is 4n xx ab II. The medium at a will be in the same phase as d after (4)/(3n)s III. The phase difference between b and e is (3pi)/(2) Which of these statements are correct

Answer the following questions: Give detailed information about how the merchants of olden times used a magnet while travelling.

Question based on paragraph : A boy pushed his toy car on a table . The car moved ahead and stopped after travelling a certain distance . But when he kept on pushing his car , the car started moving with a uniform velocity . The boy later decided to do some adventurous activity while playing with his car , so he launched his toy car from a platform to a bucket filled with water as soon as the car landed inside the bucket , the water from the bucket splashed out and the boy enjoyed his new game .: Why did the toy car stop after travelling a certain distance ?

Why are substances like platinum and palladium often used for carrying out electrolysis of aqueous solution?

A ray of light incident on a glass slab of refractive index frac(3)(2) , travels a distance of 6 cm in glass in time (t). What will be the distance travelled by the ray in the same time (t) if it travels in air?

Paragraph-based questions Read the paragraph and answer the questions given below: Disasters can be properly classified into three categories. viz. natural disasters, technological disasters and man-made disasters. The forces that cause natural disasters cannot be controlled. Moreover, they are becoming more frequent in the current years due to phenomena of climate change. On and off incidences of cyclones, cloud bursting, floods, etc. are creating havoc in the lives of people. Technological disasters are due to improper and callous behaviour at the different processes carried out in technical establishments. Man-made disasters are conflicts arising due to different religions, regions and terrorism. Which disasters cannot be controlled? why?